If your submission is In Review, you can view its details in the section (linked from the top of your page).
First, you will see the basic submission information again.
Below that is the Peer Review section. You will see information about each round of review (there may be one or more) and any revised files (e.g., a version of your original submission file with changes marked in) uploaded by each reviewer (Reviewer A, Reviewer B, etc.).
Last on this page is the Editor Decision section. From this section you can notify the editor once you have submitted your revised submission file, view the reviewer comments (click on the cloud icon), and upload your revised submission file (if revisions were required).
Possible decisions include:
Accept: Your submission has been accepted as is.
Revisions Required: Your submission requires minor changes and will be accepted once those have been completed.
Resubmit for Review: Your submission needs significant re-working. A new file must be submitted and another round of review will take place.
Reject: Your submission was not accepted for publication with this journal, either because it was not seen to be of high enough quality, or its subject did not match the journal.